Hi Dan,
If you want to display all this on a 3D Model, it may be quite difficult.
Also, this would be an extremely difficult project...I can't say I've ever seen something like what you're talking about before, of such a scale. But I am sure it can be done. I'm used to your simple prop and shaft idea
(Even though obviously, things such as Bow Thrusters, and floatation devices, I've heard of. But it's just something rather unusual, And I don't know if you've made a model before, I would be impressed to see it! Good luck!)
Anyway. I might as well be straight with you. If you wanted to show this on a 3D Model, then you'd probably have to have a good idea in what you're doing...I would advise you just to draw out roughly what you want, and possibly then try it out 3D Wise, simply. Then just label where you'd like what.
If I can be of any assistance, please do ask, because I can help in both departments
Jack.
p.s. E-mail me on: accordionjack@googlemail.com
MSN: irishjack.6@msn.com